Switch and switch box



Dec. 16, 1924,;

Eye

E. L. KRAG swx'rcn' AND swn'cn BOX ,Filgggi Sept. 20. 1920 2 Sheets-Sheet 1 E. L. KRAG SWITCH AND SWITCH BOX Filed Sept. 20, 1920 2 Sheets-Sheet 2,

etented 15, i924.

ERIK L. KRAG, OF CHICAGO. ILLINOIS.

SVJ'ITCE-I AND SV/ITGEI 336K.

Application filed. September 20, Serial No. 411,575.

To all whom it may conceive:

it known that l, lhnn ll. lines, :1 clti zen off the United States. residing at (lie cage, in the county of Cool; and State of 5 Illinois, have invented certain new and use tul Improvements in Switches and t witch Boxes, oi which the following a specification.

This invention relates to electric switches and has for its object the prodnction of an electric switch, suitable to be mounted in an enclosing box together with a box for the purpose suitably arranged not only to enclose the switch but to prevent persons using the switch from opening or closing; the same except when the box itselt is closed. Means are provided whereby the switch may be conveniently opened when the box is closed, but. the box canni'it be 20 opened when the switch is closed. and the switch cannot be closed when the her: is opened. Other objects ot the inventio will appear from the accompanying: in. w nes side elevation of the closed hon: o is a section oi? the same along the line of l ig. 4; Fig. 6 is a side elevation or the box with portions thereof broken away; F C is a section along the line '7T oi Fig. 6; l 8 is an. end view of the box with a porti on broken away; Fig. 9 is an elevation of a modified form of switch; and Fig. 10 is a sectional view along the line 10l0 of Fig. 9.

The torm of switch which I prefer is mounted upon a base 10 and supported by the bearings ii. and comprise: a, rod 9 retatably mounted in the bearings, and hav no; handle 12 fixed thereto. In this instance I have shown the rod 9 with a square crosssection, that portion within the bearings being rounded, but it is to be understood that the shape of the cross-section is not material to my invention. Enclosing; the rod 9 is a tube 14 of any suitable insulating material; and the knife blades 15 of the switch are fixed to this tube, so that the blades are nonrotatable with reference to the rod 9. Clips 13 are mounted on opposite sides of each blade so as to be in electrical contact therewith at all times, and are fixed to the base-board i0 is any suitable inanigior. and the clips connect-c in any ordinary manner t he "time pin socket of the fuse lo which is mounted in any ordinary wire connector 8.

l. this arrangement it will be seen that when the handle 12 is pro 'ierly operated the outer ends ot the switch blades 15 will be elevated or lowered the care may be. (in he base-inward ii are ziiounted other suitable clips 8' for enacting with the knife blades when the switch is to he closed. .1. lthougrh l have showi'i a single throw switch, it is obvious-i that the same general arrangl'cment could be applied to a double throw switch. The switch blocl: 10. with the switchthereon. is mounted in a box 1? of suitable shape. and the rod 9. with the handle 12 herei. projects out of one side of the box h c. iiitable opening 238. ft. lid 39 is suitably hing, .d to the box l7, the hinges thereot being: at the rear side of the box; [to term of latch may be used to e l preter e hitch ront side oi the lid and so arranrred 1i dctc-iit -l-(l th reon enters a peiiina' in the box and holds the lid closed, a Spring l-l iorcin r the detent into i he openin To preve t opening: the lid when the switch closed, the hitch 23 is so nla et. that the handle l .4 wil hold it in the closed position until the switch is fully opened. But by turning the handle l2 to the vertical position. and thus o 'iening the switch wide. the detent may be removed troin the openin Q l and the box lid raised. To prevent ClOSinn' the switch when the lid is opened a collar 18 is fixed to the rod 9 adjacent to the tront liiearing l1, and a recess 19 is provided in the collar into which a detent 20 passes when the arm 112 in. its vertical position, and this detent. by means of the spring 42, thus holds the arm 12 in its verticel position, and thus the switch. wide open, until the lid is closed. When the lid is closed a finger 21. is torced downwardly by the lid against he detent 20 and the collar 1.8 is released "from the detent, and the switch may be closer. Any suitable means such, as '1 lug. 22, fixed to the lid, may be used for forcing the finger downwardly. In order to prevent the switch from being thrown backwardly beyond the vertical position, in case of a single throw iii) switch, I provide lugs 43 and 4.4- npon the bearing 11 and the collar 18, which come in contact with each other when the switch. blades reach the vertical position.

In order to provide for changing the means for passing wires into the switch box ends I provide removabl end pieces to. The end pieces have tiang ii on the lower edge which pass under lingers 457 formed in the bottom oi the box, and the end pieces re placed against flanges 4-8 termed on the sides of the b0 1', and are held in place by means oi spring clips d9 fixed to the sides of the box. By this means end plates having an desired number or'sisci of wire openings may be used.

Figures 9 and 10 represent a nioditied form of switch. This switch comprises the pivoted blades which are fixed to an insulation bar 32, and the bar is operated by the rod 30 rotatably mounted in the bearings 31, so that when the end of the rod 30, slidably passing through. an o iening in the bar 32, is raised or lowered, the blades will be raised accordingly and the switch accordingly opened or closed. it is to be understood that this modified form of switch may be enclosed in a box similar to the one here inabove described, and the various interlocking means described with reference to that box and switch may be applied as well to the modified form of switch. An insulation sleeve 35 surrounds rod 30 between the bearings 31 and passes through the openings 36 in the support of the front blade of the switch.

I claim as m invention:

1. The combination of a box and an electric switch, said switch comprising a rod rotatabl mounted in said b 2.1 and extending outside of the box, a switch plate lixed to said rod and insulated therefrom, a wire connector arranged to coact with said. plate when the plate is in its closed position and another wire connector arranged to react with said plate in all positions of the plat e, said bor: having a lid, and means to prevent opening of said lid when said switch is closed. said means comprising a handle fixed to s: rod outside 0t said box, and a detent fixed to said lid, said box having a recess ad: pted to race '2. said detent, and said handle arranged to hold said detent in said recess when said switch is closed, and means to p vent closing of said switch when said box 15- open. said niezins comprising a collar lined to said rod, and. a detent pivoted to said box. said collar having a recess there in a apted to receive said detent when said box and switch are open, and means tor torcno said detent from said recess when said id is closed.

' The eombinatimi oi a box and an elec tr c switch said switch comprising a rod rotatably; mounted in said box and extendr outside of t iel ix, a switch. blade fixed to said rod and insulated therefrom, a wire conneetor ;-..rauged to coact with said blade when the lilade is in its closed position and 

